Skybolt Aerospace Fasteners

The Complete Quarter-Turn Fastening System, From Stud to Spanner Head

CLoc®, ZLoc®, and ALoc® Fasteners, Receptacles, Grommets, and Hardware for Every Cowling, Panel, and Access Door

Skybolt studs, receptacles, grommets, nutplates, platemounts, retaining hardware, installation tools, and prebuilt kits are now available from McFarlane. CLoc®, ZLoc®, and ALoc® systems are direct-fit replacements for Camloc®, Dzus®, and Airloc®/Southco® hardware.

CLoc®, ZLoc®, and ALoc® Quarter-Turn Studs

Direct-fit Replacements for Camloc®, Dzus®, and Airloc® Studs
Removable quarter-turn studs across six CLoc® series, plus the ZLoc® and ALoc® families, in steel, stainless, and Skytanium®.

Key Features:

• FAA-PMA approved, TSO-C148 certified (series-dependent)
• 100% interchangeable with Camloc®, Dzus®, and Airloc® part numbers
• Steel, stainless steel, and Skytanium® construction
• Skytanium® option cuts weight up to 50% with no loss of strength
• Slotted, Phillips, Torx, winged, knurled, and folding-ring head styles

Browse all Skybolt Quarter-Turn Studs here. Or find your applicable part number using the Skybolt part number selector.

Receptacles & Receivers

Fixed, adjustable, and floating receptacles to match every stud series
Receptacles are the panel-mounted half of the system, engineered to accept CLoc® and ZLoc® studs and hold cowlings and access panels closed under vibration and flight loads.

• Fixed and adjustable-depth configurations
• Rivet-mount installation
• Steel, stainless, and aluminum construction
• Compatible with SK2600, 2700, 2800, and 4000 series studs
• Encapsulated and non-encapsulated options for corrosion protection

Browse all Skybolt Receptacles and Receivers. Or find your applicable part number using the Skybolt part number selector.

Grommets

Wear-resistant seats that protect the panel from fastener cycling
Grommets swage or crimp into the panel's mounting hole, protecting the surrounding material from wear during repeated fastener cycling.

• Flush and crimp-style designs
• Steel, stainless, and Skytanium® options
• Multiple diameters and grip depths to match stud and receptacle sizing

Browse all Skybolt Grommets here. Or find your applicable part number using the Skybolt part number selector.

Platemounts & Cowling Mount Plates

Reinforced mounting points for curved or thin panel structures
The SK2003 platemount series gives CLoc® receptacles a dedicated, reinforced mounting point on firewalls and cowlings, including direct fits for popular Cessna airframes.

• Fixed and adjustable configurations
• TSO-C148 certified, US patented
• Designed for firewall and cowling mounting applications
• Adjustable versions accept Southco®, CLoc®, and Camloc® fasteners

Browse all Skybolt Platemounts here. Or find your applicable part number using the Skybolt part number selector.

Installation Tools & Accessories

Purpose-built tools for CLoc® and ZLoc® service
Pliers, dual-sided fastener tools, and removal tools to properly install, remove, and service CLoc® and ZLoc® fasteners.

• Purpose-built for CLoc® and ZLoc® fastener installation and service
• Dual-sided fastener tools cover multiple series in one tool
• Removal tools for damaged or worn retainers

Browse all Skybolt tools here. Or find your applicable part number using the Skybolt part number selector.

Fastener Hardware & Retainers

The small parts that complete a Skybolt installation

Retaining rings, springs, and washers that secure CLoc® and ZLoc® studs and receptacles for specific panel and application requirements.

• Retaining rings, springs, and washers
• Steel and stainless steel material options
• Sized to match corresponding stud, receptacle, and grommet part numbers